12 Month Limited Warranty - AEM 30-0300 Instruction Manual

12
30-0300 X-Series UEGO Gauge
The gauge requires a minimum supply voltage to properly drive the UEGO sensor heater and will display "bAtt" if a low
voltage condition is detected. Please ensure the vehicle's battery is in good condition, e.g. >12V engine off, >13.8V
engine running.
I installed my gauge correctly and the display just shows four dashes, "- - - -"
Four dashes means the sensor is detecting a very lean, high oxygen content higher than 20:1 AFR. This is completely
normal behavior in conditions such as engine off, decel fuel cutoff, or when the sensor is outside of an exhaust in open air.
It may also be indicative of an exhaust leak upstream of the sensor, or a sensor installed too close to an open air source,
especially if this occurs only at idle and light loads.
I performed a free air calibration but the gauge reported "FAIL"
The sensor must be removed from the exhaust to perform a free air calibration. Remove the sensor from the exhaust to a
fresh air environment that is free from exhaust or chemical/solvent fumes.
My engine has two banks, can I wire two sensors into one gauge and switch between them?
No, each sensor must have its own dedicated controller/gauge. Alternatively, the AEM P/N 30-2340 4 Channel Wideband
UEGO Controller may suit your needs.
Can I extend the wires in my sensor harness?
Yes, but use of at least 20AWG and proper crimping/soldering techniques is required.
My sensor/gauge seems bad, how can I test it?
The gauge may be powered from a car battery or bench power supply (3A minimum) to perform this test. Once the gauge
is powered, it should display "SenS" prior to connecting the sensor. Once the sensor is connected, the gauge should
display the sensor type and indicate it's going through the heat up process. If the sensor is in open air, such as on a
workbench, the gauge should display full lean as indicated by "----" within ~30 seconds. The gas from an unlit butane
lighter can be used to simulate a rich condition when introduced to the sensor. A powered sensor will become hot enough
to burn and/or ignite anything flammable -- HANDLE WITH CAUTION. The gauge should visibly sweep rich then lean as
the butane is introduced/removed.
Is the X-Series UEGO controller/sensor compatible with alternative fuels such as E85, methanol, ethanol, CNG,
etc?
Yes. The lambda display mode and faceplate is recommended when using fuels other than gasoline. The AFR display
mode uses the gasoline stoichiometric ratio of 14.65 which might be confusing for alternative fuels. Remember that AFR
= (lambda * stoichiometric ratio).
For support, contact AEM Technical Support at 1-800-423-0046 or gentech@aemelectronics.com.

12 Month Limited Warranty

Advanced Engine Management Inc. w arrants to the consumer that all AEM High Performance products w ill be free from defects in material and
w orkmanship for a period of tw elve (12) months from date of the original purchase. Products that fail w ithin this 12-month w arranty period w ill be
repaired or replaced at AEM's option, w hen determined by AEM that the product failed due to defects in material or w orkmanship. This w arranty is
limited to the repair or replacement of the AEM part. In no event shall this w arranty exceed the original purchase price of the AEM part nor shall
AEM be responsible for special, incidental or consequential damages or cost incurred due to the failure of this product. Warranty claims to AEM
must be transportation prepaid and accompanied w ith dated proof of purchase. This w arranty applies only to the original purchaser of product
and is non-transferable. All implied w arranties shall be limited in duration to the said 12-month w arranty period. Improper use or installation,
accident, abuse, unauthorized repairs or alterations voids this w arranty. AEM disclaims any liability for consequential damages due to breach of
any w ritten or implied w arranty on all products manufactured by AEM. Warranty returns w ill only be accepted by AEM w hen accompanied by a
valid Return Merchandise Authorization (RMA) number. Product must be received by AEM w ithin 30 days of the date the RMA is issued.
UEGO oxygen sensors are considered w ear items and are not covered under w arranty.
Please note that before AEM can issue an RMA for any electronic product, it is first necessary for the installer or end user to contact the EMS
tech line at 1-800-423-0046 to discuss the problem. Most issues can be resolved over the phone. Under no circumstances should a system be
returned or a RMA requested before the above process transpires.
AEM w ill not be responsible for electronic products that are installed incorrectly, installed in a non-approved application, misused, or tampered
w ith.
Any AEM electronics product can be returned for repair if it is out of the w arranty period. There is a minimum charge of $50.00 for inspection and
diagnosis of AEM electronic parts. Parts used in the repair of AEM electronic components w ill be extra. AEM w ill provide an estimate of repairs
and receive w ritten or electronic authorization before repairs are made to the product.
7/12/2017 - DOCUMENT NUMBER: 10-0300
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